Vehicle braking/driving force control device

a technology of braking/driving force and control device, which is applied in the direction of electric devices, brake systems, instruments, etc., can solve the problems of reducing the control property of yaw rate or lateral acceleration that can occur in the vehicle, reducing the braking/driving force of the motor, and reducing the control property of the yaw rate or lateral acceleration. the effect of good stability of the vehicl
US20140343816A1Inactive Publication Date: 2014-11-20TOYOTA JIDOSHA KK
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
TOYOTA JIDOSHA KK
Publication Date
2014-11-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

An ECU calculates the thermal margins of the in-wheel motors, on the basis of the thermal capacities of the in-wheel motors, the allowable limit temperatures, and the motor temperatures. Next, the ECU distributes the total requested torque between the requested torques for each wheel using the percentages of the thermal margins. The ECU controls the operation of an inverter such that the in-wheel motors generate the requested torques for the wheels. Thus, the four in-wheel motors generate uniform amounts of heat.
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Description

TECHNICAL FIELD

[0001] The present invention relates to a vehicle braking / driving force control device for controlling a driving force or a braking force to produce with each wheel of the vehicle individually.BACKGROUND ART

[0002] As one form of electric cars, an in-wheel motor type vehicle in which a motor is arranged in or around the wheel placed under the vehicle body spring and drives the wheel directly is developed. In the in-wheel motor type vehicle, it is possible to control the driving force or the braking force given to each wheel independently depending on the traveling condition of the vehicle by an independent drive (power running) control or an independently regenerative control of a motor provided to every wheel.

[0003] Because a motor is arranged in or around the wheel in such an in-wheel motor type vehicle, generated heat by the braking / driving movement of the motor is hard to be emitted and the motor is easy to be full of heat. Thus, for example, in the driving force cont...

Claims

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